diff --git a/README.md b/README.md
index 721b52a32b6878ea016cd736436ab447b0a8acb4..fd422f1329c1b73fdeef3160f3aa2691aacb830e 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,7 @@ python3 manage.py createcachetable
 
 Run tests
 ~~~
-python3 manage.py test <option test module name>
+python3 manage.py test <optional test module name>
 ~~~
 
 Apply constraints and indexes on labels for the node definitions. This should be executed after any schema changes